Miner s safety-lam p



(No Model.)

T. H. WILLIAMS. MINERS SAFETY LAMP.

No. 570,780. Patented Nov. 3, 1896.

UNITED STATES PATENT OFFICE.

THOMAS HENRY XVILLIAMS, OF MOUNT CARMEL, PENNSYLVANIA.

MINERS SAFETY-LAM P.

SPECIFICATION forming part of Letters Patent No. 570,780, dated November 3, 1896.

Application filed November 15, 1895. Serial No. 569,072. (No model.)

To aZZ whom it may concern.-

Be it known that I, THOMAS HENRY WIL- LIAMS, of Mount Carmel, in the county of Northumberland and State of Pennsylvania, have invented a new and Improved Miners Safety-Lamp, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved min ers safety-lamp which is simple and durable in construction, very sensitive relative to gases in a mine, and arranged to prevent relighting of the lamp by the miner.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims. v

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement with parts in section. Fig. 2 is a plan view of the cup carrying the sleeve-locking device, and Fig. 3 is an inverted plan view of the same.

The improved miners safety-lamp is provided with a lower cylindrical body part A, from which extend upwardly the rods A, supporting the middle body part A between which and the body part A is arranged a glass cylinder B, through which pass the rays of light, as hereinafter more fully described.

From the middle body part A extend upwardly the rods A carrying a cap A*, between which and the middle body part A is arranged the usual gauze cylinder O, terminating in a sheetmetal cylinder 0 and adapted to be opened and closed by the usual sleeve C as is plainly indicated in Fig. 1. a

The top of thesheet-metal cylinder 0 is closed by a netting 0 above which extends a curved shield or cap A carrying an eye A", connected with a hook A for suspending the lamp from above. An eye A is also arranged on the cap A to suspend the lamp from one side. The parts so far described are the same as those found in the ordinary Davys safety-lamp.

Into the lower body portion A screws the fount D, adapted to contain mineral or other oil, into which extends the lower part of the.

through which extends the pointed arm G of the wick-raising rod G, extending through a tube D leading from the bottom of the fount D to the top thereof and within the chamber D, as is plainly indicated in Fig. 1. The lower end of the wick-raising rod G is provided with the usual handle G adapted to be taken hold of by the operator, so as to turn and push the rod to raise the wick whenever it is necessary.

On the wick-tube F is formed a disk F, resting on the top edge of the side wall of the chamber D and held in place by a cap D screwing on the said side wall of the chamber. The upper end of the wick-tube F extends through a sleeve H, having a beveled exterior surface formed near the base with an annular recess I-I, directly above the bottom of an inverted cup 1, formed at its lower edge with an outwardly-extending annular flange I, screwing into an interior thread on the body part A.

The bottom of the inverted cup I is formed with a central opening lithrough whichpasses the base of the sleeve H, the latter being provided at its base with an annular outwardlyextending flange 1-1 resting between the cup bottom and the top surface of thecap D 1 The annular recess H of the sleeve H is adapted to be engaged by the arms J of a spring-rod secured at J to the top surface of the cup I to securelylock the said sleeve H in place after being introduced from underneath in the opening 1 It will be seen that when the sleeve H is passed upward in the opening I the wedgeshaped exterior surface of the sleeve presses the spring-arms J apart until the latter come into alinement with the annular groove 11 and snap into the same, so as to lock the sleeve in position.

Over the free ends of the spring-arms J extends a transverse rod J secured at its ends at J to the bottom of the inverted cup I, as is plainly illustrated in Fig. 2. On the extreme outer ends of the spring-arms J are formed upwardlyextendinghandles J 4 to enable theoperator to press the springearms apart whenever the cup I is removed from the body A to permit of removing the sleeve H in a downward direction through the opening 1 On the under side of the flange I are se-- curedprojection s'lfladaptedto beengaged by a key, wrench, or like tool, to permit an authorized person to unscrew the said-cup I from the body A after the foun't D'has been unscrewed.

Now it will be seen that when the several parts are in the position illustrated in Fig. 1' the miner can manipulate the wick-raising rod G so as to first turn the same to move the pointed arm G outof engagement with the wick andthen pull the rod G downward .and again turn the same to movethe arm G :in contact with the wick at or .near the bottom of the slot F IBy'now'pushing-therod Gupward thewick is raised in the tube Now it will beseen that any oil pressed out of the wick while pushing upward with the wickraising'rodG, as justdescribechwill flow down the tube F through the larger opening in the top of the fount D back into the latter without danger of any oil passingto .the wire-gauzeto cause explosions, as heretofore:experiencediin the ordinary minefssafety-lamp. It will .further be seen that when the miner unscrewsl the fount D and draws the same downward from thebodyA thenthewick-tube F is caused to. slide downward with the :fount through the sleeve H, locked in :place by the spring-arms J. New during this downward movementof the wick-tube F in the sleeve the burning wick is extinguished,as the necessary air-supply above is out oii. Should the miner light the wickE after the-fount D has been rem oved, 1

andthen attempt to put the 'fount back into its position in the body A, the light will be extinguishedthe moment the sleeve F passes'with its upper end through the aperture in the cap D into the sleeve II. Therefore the miner cannot relight the lamp afterhe onceunscrcws the fount'D,-and consequentlyhe must go to an authorized person having a key for unscrewing the cup I.

on the wick-tube F, after which the projecting end of the wickis lighted.

A, and the fount Dis serewedin position with the sleeve H passing upward through the apertured bottom of the cup I to be finally engaged by the spring-arms J at the time the fount D is screwed home. that when the min er unscrews the fountD the sleeve H remains locked in position onthe .top of the cup Land consequently the upper end of the wick-tube F passes down in the sleeve II and the light is extinguished.

Having thus fully'described my invention,

I claim as new and desire to secure byLetters Patent- 1. A miners safety-lamp, comprising a The authorized person, :after unscrewing the cup, presses the spring-arms J apart to remove the sleeve H, which is then i The cup I is then screwed back into position in the body Thus it will be seen lamp-body, an inverted cup having an aperture in its bottom and formedatits lower end with an outwardly-extending flange screwing into the said body, a sleeve having a beveled or tapered exterior surface and formed with a flange at its lower end to engage the bottom of the-eu-p,-the said sleeve ext-endin g throu gh the aperture in the cup and adapted to form a passage for the wick-tube, and a locking de- 'fountand adapted to {pass through the :said

sleeve, substantially-as shownandrdescribed.

3. A minerslanip,comprising-alamp bod. an inverted cup screwing into the said'body, a sleeve formed with a-flange to engage ?the under side of the cup,:thersaidsleevezprqjedt ing through an aperturexin thecup, a locking device to engage the saidsleeve, afountscre'wing in the lower endgoi' ithe lamp body-andprovided with :a separate chamber on its adapted to :extend within thesa'id inverted cup, a wick-tubesupported on the said chamber and adapted .to pass through "the said sleeve, the said wick-tube being provided within the chamber with aslot to receive the wick-raising device, and .an apertured :cap closing the top of the said chamber and through which the wick tube extends, .sub-

stantiall-y as shown -anddescribed.

4. A minerslamp,acom.prisinga lamp-body, an inverted cup formed at its'lower-edge with .an outwardly-extendingannular flange screwing into-the said body, the saidicup'being provided with an aperture in'its1bottom,:a sleeve formed-with a flange-at its lowerend toengage the underside of the :bottom of thecupgthe said sleeve eX-tendlingthrou ghzthe 'ap'erturerin the bottomof the-inverted cup :and projecting above thesame, a locking device held .on the screwing in the lower end of theeaid lampbody .and provided with a separate :cham'ber' onits top, a wick-tube provided with-a disk or flangeadapted to restonthe top of thesaid chamber, and an apertured cap closing 'the said cup to engage the said sleeve, a fotmt top of said chamber andholding the disk D1 flange on the wick-tube in place, the said flange on the sleeve-resting between 1111821301) surface of the apertured {cap and the under surface of the bottom of the cup, th'esaidwiektube being adapted to pass through the said chamber, apertured cap,"andzsleeve, substantially as shown and described.

5. A miners safetylamp, comprising a lamp-body, an inverted cup screwing in the lamp-body and provided in its bottom with an aperture, a sleeve havinga beveled or tapered exterior surface and formed with a flange at its lower end to engage the under side of the bottom of the cup, the sleeve extending through the aperture and projecting-"above the cup,and provided with an annular recess located directly above the bottom of the cup when the sleeve is in position, and alocking device,comprising a spring secured to the surface of the cup and provided with arms located at opposite sides of the aperture in the cup, the beveled exterior surface of the sleeve engaging said spring-arms and pressing them apart when the sleeve is inserted in the aperture in the cup, and the annular recess in said sleeve receiving said spring-arms when the sleeve is in position, substantially as shown and described.

T IoMAs HENRY WILLIAMS.

WVitnesses:

DAVID CAMP, JAMES M. DERBY. 

